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Keenan Wynn (July 27, 1916 – October 14, 1986) was an American character actor. His bristling mustache and expressive face were his stock in trade, and though he rarely had a lead role, he got prominent billing in most of his movie and TV parts.

Wynn was born in New York City, New York as Francis Xavier Aloysius James Jeremiah Keenan Wynn, the son of Jewish American vaudeville comedian Ed Wynn and his Irish-American Catholic wife, the former Hilda Keenan. He took his stage name from his maternal grandfather, Frank Keenan, one of the first Broadway actors to star in Hollywood.

Ed Wynn encouraged his son to become an actor, and the two appeared together in the original Playhouse 90 television production of Rod Serling's Requiem for a Heavyweight. The son was returning the favour: according to radio historian Elizabeth McLeod, it was Keenan who had helped his father overcome professional collapse and a harrowing divorce and nervous breakdown to return to work a decade earlier, and who now helped convince Serling and producer Martin Manulis that the elder Wynn should play the wistful trainer. He also appeared in a subsequent TV drama detailing the problems they had experienced while working on that show called The Man in the Funny Suit. In it, the Wynns, Serling, and much of the cast and crew played themselves. Keenan was also in another Rod Serling production, a The Twilight Zone episode entitled, "A World of His Own".